Question

Make the greatest and the smallest 4-digit numbers using any four different digits with conditions as given
a. Digit 7 is always at ones place
b. Digit 4 is always at tens place
c. Digit 9 is always at hundreds place
d. Digit 1 is always at housands place

Answer 1

1947 is the resulting number that follows the given conditions.

a) 7 at ones place = 7 x 1 = 7
b) 4 at tens place = 4 x 10 = 40
c) 9 at hundreds place = 9 x 100 = 900
d) 1 at thousands place = 1 x 1,000 = 1,000

1,000 + 900 + 40 + 7 = 1,947

Answer 2

Given that,

Make the greatest and the smallest 4-digit numbers

We need to write smallest and greatest 4 digit number

Using given condition

(a). Digit 7 is always at ones place

(I). smallest number = 1007

(II). greatest number =9997

(b). Digit 4 is always at tens place

(I). smallest number = 1040

(II). greatest number =9949

(c). Digit 9 is always at hundreds place

(I). smallest number = 1900

(II). greatest number =9999

(d).  Digit 1 is always at thousands place

(I). smallest number = 1000

(II). greatest number =1999

Hence. This is required answer.